Hanagimi to Koisuru Watashi

Nanase Sakashita is good at playing the role of model student but that doesn't stop her from taking an interest in Hana-kun, the school's delinquent. Hana-kun accidently drops a small box while sneaking around on the school grounds. When Nanase tries to return the box, Hana-kun tells her to keep it for its already to late to give it to the person he likes. Who is this person?!